53406563 has 8 divisors (see below), whose sum is σ = 62188128. Its totient is φ = 44913024.

The previous prime is 53406557. The next prime is 53406593. The reversal of 53406563 is 36560435.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53406563 - 2⁴ = 53406547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53406553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71606 + ... + 72347.

It is an arithmetic number, because the mean of its divisors is an integer number (7773516).

Almost surely, 2^53406563 is an apocalyptic number.

53406563 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

53406563 is a deficient number, since it is larger than the sum of its proper divisors (8781565).

53406563 is a wasteful number, since it uses less digits than its factorization.

53406563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144013.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 53406563 is about 7307.9794061013. The cubic root of 53406563 is about 376.5866121495.

Adding to 53406563 its reverse (36560435), we get a palindrome (89966998).

The spelling of 53406563 in words is "fifty-three million, four hundred six thousand, five hundred sixty-three".